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pantera1 [17]
3 years ago
9

at 7 p.m. last night, the temperature was 10 degree. at 7 a.m. the next morning the temperature was -2 degree. By how much did t

he temperature change from 7 p.m. to 7 a.m.? By how much did it changed each hour?
Mathematics
2 answers:
Brums [2.3K]3 years ago
5 0
Change in temperature =  -2 - 10 = -12 degrees

rate of change per hour = -12 / 12 = -1 degree.
xxTIMURxx [149]3 years ago
4 0
The temperature changed by 12 degrees in 12 hours meaning one degree per hour.
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What is true of the function g(x)=-2x^2+5?
mart [117]

Answer:

C) The variable x represents the independent variable.

Step-by-step explanation:

The given function is g(x)=-2x^2+5.

g(x) is NOT the multiplication of g and x because g is a function of x.

x is the input of the function.

-2x^2+5 is the output of the function.

The variable x is called the independent variable because we plug in values of x to find g.

The variable g represents the output of the function NOT the input.

The correct choice is C

8 0
3 years ago
2 3/4+1 1/5 i need this for math, im kinda stupid, please dont anwser if you dont know its for a test XD
Oksi-84 [34.3K]

Answer:

3  19/20

Step-by-step explanation:

So...

The first step is to find a common denominator between the 2. The smallest common denominator is 20. So you would do 3/4 times 5/5 which is 15/20. (2 15/20)

1/5 times 4/4 = 4/20(1 4/20)

So the final step is to add them together

2 15/20 + 1 4/20= 3 19/20.

This is the most simplified answer you can get.

5 0
3 years ago
What is the slope of the line which passes through (−2, 0) and (0, 4)? (5 points) 2 Undefined −2 0
krek1111 [17]

Answer:

The answer is option 1.

Step-by-step explanation:

You have to apply Gradient formula :

m =  \frac{y2 - y1}{x2 - x1}

let \: (x1 \: , \: y1) \: be \: ( - 2 \: , \: 0)

let \: (x2 \: , \: y2) \: be \: (0 \: , \: 4)

m = \frac{4 - 0}{0 - ( - 2)}

m =  \frac{4}{2}

m = 2

6 0
3 years ago
Read 2 more answers
For a ride on a rental scooter, Deon paid an $8 fee to start the scooter plus 6 cents per minute of the ride. The total bill for
faltersainse [42]

Answer:

66 minutes

Step-by-step explanation:

11.96 - 8 =3.96

Every 10 minutes Deon pays 60 cents because 6 times 10 = 60 and every 6 minutes Deon is paying 36 cents

10 min = 60 cents

20 min = $1.20        

40 min = $2.40

50 min = $3.00

60 min = $3.60

6 min = 36 cents

Then you do 3.60 + 36 which equals $3.96

How to figure how the minutes is just 60 + 6 = 66 minutes

7 0
2 years ago
A circle has centre (3,0) and radius 5. The line y = 2x + k intersects the circle in two points. Find the set
lara [203]

A circle with center (3,0) and radius 5 has equation

(x-3)^2+y^2=25 \iff x^2 + y^2- 6 x  = 16

If we substitute y=2x+k in this equation, we have

x^2+(2x+k)^2-6x=16 \iff 5x^2+(4k-6)x+k^2-16=0

This equation has two solutions (i.e. the line intersects the circle in two points) if and only if the determinant is greater than zero:

\Delta=b^2-4ac=(4k-6)^2-4\cdot 5\cdot (k^2-16)>0

The expression simplifies to

-4 (k^2 + 12 k - 89)>0 \iff k^2 + 12 k - 89

The solutions to the associated equation are

k^2 + 12 k - 89=0 \iff k=-6\pm 5\sqrt{5}

So, the parabola is negative between the two solutions:

-6-5\sqrt{5}

8 0
3 years ago
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